End of the World: My Items Can Be Upgraded Infinitely.

Chapter 147: The Furnace Cave, Ling Shuyan's Arrival

As everyone gets ready, the battle is about to begin.

At Lin Feng's command, five second-level awakeners led a hundred soldiers and launched a surprise attack on the swarm of red beetles near the wall.

To deal with low-level red beetles, there is no need to use shotguns. Soldiers can kill them all with large-caliber rifles and heavy machine guns.

At the same time, you can also use this to improve your own level.

After one wave, more than a dozen soldiers have been upgraded to level 9 enhanced humans. They only need to kill one more black-backed insect to become the next awakener.

Shen Jie rushed to the front of the team and transformed into a black warrior. His black armor was integrated with the modified battle armor on his body. The two-meter-long sharp bone blades on both sides of his arms chopped out a "X"-shaped cut on the thick wall.

The tens of tons of power of a mid-stage second-stage awakener, combined with the extremely fast burst of the black warrior form...

The bone blade flashed white light, and the half-meter-thick wall was easily broken.

A gap about four or five meters wide appeared before everyone's eyes as the shattered concrete wall collapsed and splashed.

The sound of gunfire and breaking walls had interrupted the busy work at the shipyard. Many black-backed insects put down their cutting work and gathered outside the dock.

The second-level awakener raised a shotgun and launched an attack, with the soldiers behind him following.

In order to allow the enhanced human to kill the awakened being as quickly as possible, Shen Jie instructed the legion team to only aim at the limbs and lower abdomen of the black-spine worm, not to hit the head, and to seriously injure it.

The final killing mission is handed over to the new recruits.

To deal with ordinary black-backed insects, five second-level legion members are enough to take care of them. Shen Jie then came to Lin Feng.

At this moment, Lin Feng was standing next to the deep pit in the center of the shipyard, staring at the hole at his feet that was submerged in river water.

The entire wormhole has a diameter of 20 meters, far exceeding the size of ordinary ground wormholes, and can allow second-order tiger-spine worms to enter and exit.

The red beetles that were responsible for carrying the steel were now throwing the small pieces of special steel they had cut into the tank.

The water is rich in metal minerals and its density is much higher than that of air. The speed at which special steel blocks fall inside it will also be greatly reduced.

But the red beetle did not drill into the well in front of it.

Lin Feng slowly squatted down and reached his hand into the water at the entrance of the cave.

Sure enough, the water in the cave well was hot.

And it gets hotter the further down you go.

Therefore, the Zerg did not collect and transport special steel, but directly used local materials to build a biological furnace that could synthesize the second-order tiger-spine worm's jaws.

The rushing water from the rivers a few hundred meters away is the best coolant for the high-temperature forging furnace.

Through telepathy, Lin Feng sensed that there was a huge light source two hundred meters deep inside the cave.

It was a living biological furnace, containing thousands of life energy.

Comparable to a high-level life form!

However, he has no ability to think, let alone move.

Judging from the situation, the possibility of the existence of second-order insect eggs is very small, but there should be quite a few forged orange-quality giant jaws.

Lin Feng thought about it, looked around, and finally found a steel cable as thick as his arm. It was about two hundred meters long. One end was given to Shen Jie to be tied to the crane, and the other end was tied around his waist.

Then he jumped into the cave.

The surface water temperature is about 40 to 50 degrees.

Ordinary people can easily withstand it, but as the diving depth increases, the temperature suddenly rises to seventy or eighty degrees.

This temperature is enough to denature the protein, break the peptide bonds, and eventually cook the meat.

Through the visor, Lin Feng could see the rising heat waves surging upwards and exchanging heat with the cold water in the cave above.

At this moment, he had already dived to a depth of sixty or seventy meters. He could not see clearly the dark abyss beneath his feet, and the temperature of the water in the nearby well was getting higher and higher.

At seventy or eighty degrees, even a first-level awakener cannot withstand it for long. When it reaches a depth of more than one hundred meters, the boiling water waves will still burn Lin Feng even if he is covered by the Flying Tiger Armor.

No wonder the Zerg dared to place the biological furnace in the open air.

I guess they are not afraid of being stolen by humans.

Finally, Lin Feng's footsteps stopped at a depth of 120 meters, and numerous boiling bubbles were floating nearby.

He tried to activate the Flying Tiger Armor's absolute defense, but unfortunately the energy shield that could block extremely fast attacks was unable to stop the slowly approaching hot water.

Canceling the variant form of absolute defense, Lin Feng began to observe his surroundings in the faint light.

Then he discovered that the entire wall of the cave was covered with a layer of black coke.

That's the husk left after the biomass is burned.

But it has excellent thermal insulation effect.

Even the temperature of thousands of degrees can be easily insulated.

Lin Feng could vaguely sense that there was biological activity behind the carbon black graphite layer nearby and under his feet.

Those special steel blocks dropped by the red beetles were liquefied at high temperature and then absorbed in the biological furnace under their feet, and synthesized into super-hard giant jaws with organic molecules.

However, this carbonized layer that isolates from high temperatures has a fatal flaw: the higher the temperature, the more fragile the carbonized layer becomes.

Since it was impossible to go deeper into it to find out what was going on, Lin Feng planned to destroy the furnace directly and wait until the high-temperature reaction inside was extinguished before exploring further.

Because orange quality giant jaws are more scarce than second-level insect eggs.

At present, not only has the Flying Tiger Armor not been upgraded to the full level, but even the main equipment, the level 20 Land Cruiser, has not improved at all since the cross-level upgrade was completed.

Tomorrow is the trading day agreed with the Queen Mother. The second batch of fifty second-order insect eggs will be received soon, and the battleship can finally be upgraded.

The fusion upgrade materials that go with it must also be obtained as soon as possible.

Thinking of this, Lin Feng no longer hesitated, pulled out the level 29 electromagnetic cannon at his waist, switched back to the armor-piercing shell mode, and then started shooting deeper under his feet.

The firing speed of the armor-piercing projectile in water is several times slower due to the friction caused by the rising water flow. At the same time, the high temperature heat waves nearby also cause its warhead to gradually melt.

Several armor-piercing shells did not advance more than 50 meters before they were destroyed outside the core furnace at the bottom due to the dissolution of the shell shell.

Even if a few of them can trigger an explosion, they are like a flash in the pan, and disappear in a flash under the impact of high temperature waves.

Apart from illuminating the space at the bottom and stirring up more large boiling bubbles, it has no destructive power on the core furnace.

Seeing that he could not destroy the core of the bottom furnace, Lin Feng tried to calm himself down while sweating profusely.

Suddenly he came up with an idea and started shooting wildly at the walls of the cave around him.

At a short distance, the armor-piercing projectile successfully penetrated the carbonized layer, and then exploded violently in the cave wall.

The shock wave generated by the explosion created a huge wave of water at the bottom of the cave, which surged up and pushed Lin Feng directly to the surface of the wellhead.

As the walls collapsed, the rocks and sand inside fell into the furnace mouth at the bottom, not only covering the fleshy plug at the furnace mouth, but also isolating the high-temperature energy inside and allowing it to continue spreading to the outside world.

Unable to exchange heat through water flow, the furnace is like a sealed pressure cooker. As the temperature and pressure rise sharply, it continues to expand!

At this moment, with the help of Shen Jie, Lin Feng had returned to the entrance of the cave. Before he could stand firmly on his feet, he pulled Shen Jie and quickly moved away from the cave entrance.

After more than ten seconds, a loud grunt came from the biological furnace at the bottom.

Along with a dull noise, the ground of the entire shipyard shook violently. With the 20-meter-wide deep pit as the center, the concrete floor cracked instantly and quickly shattered in all directions like a spider web. The cracks were 20 to 30 centimeters wide and bottomless, and boiling water with steam kept seeping up.

The clear water in the cave turned directly into black and yellow. As the furnace exploded violently under high pressure, a lot of dark red boiling magma scattered out, like a ball of black mud blooming and polluting, causing countless inky black bubbles to float on the surface of the water at the wellhead.

When the bubbles burst, irritating gases evaporate into the air.

Fortunately, Lin Feng had already retreated into the dock with Shen Jie, and at this moment, the second-level legion team had also led more than a hundred soldiers to clear out the Zerg in the shipyard.

They were guarding the gate of the shipyard, blocking a large number of black-backed insects coming to support from the city.

The sound of shotgun explosions was endless.

But as the furnace inside the cave exploded, causing earthquakes and collapse, both the Zerg and the soldiers stopped fighting.

There was another creepy sound of cracking.

The damage caused by underwater explosions is divided into two parts. The first is at the beginning of the explosion, when the shock wave and vacuum bubbles spread out. When these effects gradually dissipate, the vacuum center of the explosion will shrink back madly due to the pressure.

Produce two stages of damage, first pushing and then pulling!
As a result, the dock of the shipyard close to the big river was broken into pieces and sank into the water.

Like a collapsed dam, the river water began to flow back frantically, extinguishing the boiling heat in the cave.

The filling of river water also temporarily slowed down the successive collapses near the dock.

Even Lin Feng couldn't help swallowing when he saw the horrifying explosion effect that directly changed the terrain.

The high-pressure explosion in the furnace core directly destroyed half of the shipyard, an area of ​​more than two square kilometers, and it started from two hundred meters underground...

The power is comparable to the effect of a nuclear bomb with a TNT equivalent of 100,000 tons exploding underground!
It can even kill a high-level queen in an instant!
No wonder the queen here wants to set up the biological reaction device for melting giant jaws by the river.

This is to prevent an accident from causing a devastating blow to oneself and the entire insect swarm, like a self-explosion.

As the core of the furnace was destroyed, the swarm of black-backed insects that came to rescue, as if they had received orders from the Queen Mother, began to retreat into the city and hide.

Lin Feng, who rushed over, frowned slightly when he saw this scene.

"Don't chase them anymore. First clean up the battlefield at the dock and collect the useful biological materials."

"Without the protection provided by the tanks and lacking experience in street fighting, rushing into the city would be a death wish." The five second-level awakeners nodded, agreeing with them.

Last time in Jiacheng, Lin Feng was surrounded and blocked by a swarm of black-spine insects because of his carelessness. This time, most of the hundreds of soldiers were not even first-level awakeners, and they were simply unable to resist the swarm of insects that were attacking crazily without fear of life and death in a street fight.

Some of the new recruits, in particular, could not even withstand the recoil of a shotgun. They often had to relax their severely worn shoulders after firing a few rounds in a row.

After instructing everyone to clean up the battlefield, Lin Feng asked the second-level legion team to stay on guard to prevent a Zerg sneak attack. Then he took Shen Jie and dozens of ordinary soldiers back to the broken and collapsed dock.

The aftermath of the explosion gradually dissipated.

Leaving behind a deep pit with a diameter of one hundred meters.

Under the flushing of the river water, the surging black mud and boiling hot water have disappeared.

Now you need to send someone to dive into the water, drill to the bottom, and look for the orange quality giant jaw cast in the furnace.

Lin Feng estimated that there should be quite a few.

Then he sent people to collect the steel cables from the nearby dock, tied them into a long rope of several hundred meters, and tied it around his waist.

These arm-thick steel wire cables can easily lift thirty or forty tons.

Lin Feng and Shen Jie immediately jumped into the water.

With the protection of the Flying Tiger Armor and the Winged Tiger Berserker Form, the two don't have to worry about being attacked by Zerg. As long as the exploded furnace cools down, they can move freely.

Soon, Lin Feng arrived at the original core location. The water temperature nearby was still around 40 or 50 degrees, but this did not affect the two of them. They began to move the rubble covering the furnace.

When the area near the cave entrance was cleaned up, there was a thick layer of metal cooling blocks under the broken fleshy furnace shell. Its material was very close to that of the giant jaw, but it was still a little lacking in plasticity.

Lin Feng touched it and a prompt flashed before his eyes:
"Zerg Jaw - Incomplete, Orange Quality"

「Note: Can be added as material for synthesis upgrades」

Unexpectedly, this huge piece of semi-finished product weighing more than ten tons was actually useful. Lin Feng immediately tied the steel cable around his waist to the iron block.

After confirming that it was firm, I pulled it hard.

The soldiers at the port received the signal and began to use all their strength to drag the object tied with steel cables ashore.

As the large pieces of semi-finished products were removed, another small sunken hole appeared beneath them.

The two of them worked together to dig up the buried hole.

The next moment, a small tunnel connecting deep underground appeared in front of Lin Feng.

It is only three meters in diameter and should be a conveying pipe connected to the bottom of the furnace, which is used to fine-tune the initially liquefied and formed biometal.

The two of them gestured with their hands and then went in.

Lin Feng walked in front, stepping on the solidified residual liquid under his feet, and then he discovered that the walls of the tunnel were all cast with giant jaw material. No wonder they could withstand the impact of the explosion. Apart from cracks and water seepage, there was no major damage.

The two walked one in front and one behind after a few hundred meters. The river water that had seeped in from the nearby area gradually disappeared, leaving only the cooling metal liquid remaining near the soles of their feet.

Judging from the direction of movement, it is estimated that it has entered the county town.

Lin Feng used telepathy to sense the presence of a large insect nest under his feet.

Near the pipeline, there were signs of red beetle activity. They were the ones that drilled into it and took away the biometal liquid that was flowing in to complete the final synthesis process of the second-order tiger-back worm's giant jaws.

Following the traces, the two finally emerged from a hole. Lin Feng held the electromagnetic cannon in one hand and the tiger-tooth chain saw sword in the other...

Use the flight mode and land steadily. At the same time, the flying tiger armor on your body releases the power of tiger insects, scaring away the approaching black-backed insects and red-scarred beetles.

Shen Jie followed closely behind with the steel cable.

The insect nest here is slightly different from the one the two entered underground in the eastern district of Wucheng last time.

The walls of the insect nest were covered with unknown fungi emitting a faint green fluorescence. The light illuminated the dim cave, allowing Lin Feng and the others to barely see the situation in the cave.

Deep in the insect nest, there stood a giant fleshy wall. It had no obvious head features and looked more like an infinitely growing brown-red tumor.

Lin Feng narrowed his eyes slightly. This thing should be the biological factory that the Zerg uses to produce second-order giant jaws!

Just like the previous biological furnace, they are all living organisms!

Then he took Shen Jie with him, and the two of them started cutting the mountain of meat in front of them.

With a wave of their hands and a slash of their swords, the tiger-tooth chainsaw sword in Lin Feng's hand and the bone blades on Shen Jie's arms encountered obstacles from hard objects.

The two of them pulled it out, and it turned out to be an orange-quality giant jaw that was created by organic synthesis through the red beetle's injection of liquid metal.

One, two, three...

Finally, a total of twenty-eight were found, equivalent to fourteen pairs of giant jaws.

Enough to assemble a second-order tiger-spine swarm.

But in Lin Feng's opinion, this should only be the amount produced in one or two days. With the cutting and transportation speed of the shipyard, the giant jaws must have produced hundreds or even thousands of them.

It is enough for the queen mother to hatch a large number of second-level tiger-spine worms.

The queen mother here is also making preparations in advance for the future battle of Taihu Lake.

While crushing the pile of rotten meat in front of him, Lin Feng received feedback from his telepathy, showing that a large number of tiger-backed insects were quickly approaching from a distance.

Without time to think about it, Lin Feng ordered Shen Jie to work together to tie these giant jaws to steel cables and stuff them into the channel for transporting molten metal blocks. The size was just right.

Lin Feng raised the electromagnetic cannon and fired wildly at the entrance of the insect nest in the distance, causing the cave wall to collapse, burying the entrance and exit, and blocking the second-level Zerg that came to support.

Judging from the situation, this second-level queen has not yet entered the middle stage of the third level, so no new second-level Zergs are born under her command.

But the most urgent task right now is to take away the giant jaw materials.

In order to prevent the tunnel from being damaged and sinking deeper and deeper.

With their abilities, it would be no problem for them to fight their way out. However, to drag away this huge pile of biological materials, it would be basically impossible without the cover and cooperation of the Second Order Legion!
Fortunately, Shen Jie acted quickly. After Lin Feng blocked the entrance with a gun, he also came to help. It only took a few minutes to stuff all the giant jaws into the passage.

Shen Jie walked in front, pulling the steel cable, while Lin Feng was responsible for the rear, pushing forward with all his might.

Nearly a hundred tons of force push these giant jaws forward with difficulty in a small tunnel of five to six hundred meters long.

The roar of tiger-backed insects came from behind, constantly destroying the outer shell of the tunnel wall, only a few dozen meters away from Lin Feng.

Fortunately, due to the explosion in front, water continued to seep in, and the water flow reduced the frictional resistance. Before long, the two of them successfully arrived at the entrance under the furnace.

Shen Jie tied up the giant jaws with nearby steel cables and sent them to the shore one by one.

Finally, only the angry roar of the second-level tiger-backed worm could be heard from deep inside the cave.

After obtaining the second-level giant jaw without any danger, Lin Feng sat beside the collapsed deep pit and breathed a sigh of relief.

Now we just have to wait until evening, and Chen Yanyan will control the fleet to come and pick us up.

After resting, Lin Feng walked into the dock.

The large ship being built inside looked like a warship, but unfortunately most of it had been cut off by the Zerg, leaving only the bottom of the ship, which weighed only a hundred tons.

During the search, the Zerg that retreated into the city sent out small groups of black-backed insects to launch several feint attacks from both sides, and also sent out more than a dozen first-order green-winged insects to observe the current situation of the shipyard.

These peepers were easily repelled by the soldiers. Lin Feng even used the Eye of Death with great interest to snipe the green-winged insects in the sky.

Then let Shen Jie take people to bring his body back to the account.

After failing to steal the chicken and ending up losing the rice, these Zergs stopped trying.

However, the second-level tiger-backed worm has been nowhere to be seen.

I guess he sensed Lin Feng's presence.

Or maybe the Queen Mother of Haicheng sent it a warning.

…………

As the sun was setting, when Chen Yanyan led the fleet to meet them and crossed the bridge, she brought Lin Feng an unexpected news:

"There is a woman named Ling Shuyan, who claims to be the director of the Jincheng Biological Research Institute, and she is here to discuss something with you."

"They came all the way from Jincheng. Is it related to your visit to Professor Ding in Laoshan Park last time?"

Lin Feng raised the corner of his mouth slightly as he watched the soldiers carry the giant jaw into the storage space at the rear of the battleship. He then informed them of his plan to recruit researchers to transform the second-order legion.

Chen Yanyan frowned slightly:
"I don't think that woman is a good person."

"I asked them to go to the field hospital to help first, and they said you won't be back until later."

Lin Feng nodded, left the warship and went to the dock, where he integrated the remaining materials from the warship's hull into the giant jaws of the black-spine insect and the membrane wings of the blue-winged insect that everyone had collected, and synthesized a total of twelve replicas of the flying winged tanks.

As for the remaining materials in the warehouse, they were all copied into level 19 shotguns, and some were integrated into the tanks.

When the fleet was ready to return, it already had twenty chariots as auxiliary ships, and the overall size doubled.

Such firepower can easily suppress the charge of tens of thousands of Zerg troops.

When everything was packed up, including the survivors on the other side, they boarded the chariot...

In the afterglow of the setting sun, Lin Feng stood at the bow and issued the order to return:

"I haven't met the real person in real life. Let's go back and meet this Ling Shuyan."

(End of this chapter)